Oscillating fan



- D. E. ROGERS OSCILLATING FAN @had Nov. :5, 1923 3 Shams-Sheet l mmm11H1 l i y d/ www.. 25, i924.

D. E. ROGERS OSCILLATING FAN Filed NOV. 3,

3 Sheets-Sheet 2 M 21, 3924. LSIWJISQ D. E. ROGERS OSCILLATING FAN FladNov. 5, 1923 3 Sheets-Sheet 3 Patented Nov. 25, i924.

1 i ramt DANIEL nvnnnoegiins, ,partiell/riparian, ENGLAND, lissenola rovnarvs Lr'nrrn'n, or Astron, BIRMINGHAM, ENGLAND, e BRITISH contenir.

esem-Lamine ran.

Application led `November 3, 1923. Serial No. 672,646.

To all l0/10m, t may/concern- Be it known that I, DANIEL EVAN Roenes,

a subject of the King of Great Britain, re-

sinding at Plume and Victoria iVorks, Plume Street, Aston, Birmingham,England, electrical engineer, have invented certain newv and usefulImprovements in @seillating Fans, of which the following 'is aspecification. y

It has heretofore been proposed to construct an oscillating' fan whereinthe fan wheel'is automatically oscillated about two axes substantiallyat right-angles to one another by the rotation of the fan wheel shaft,using for the purpose a circular undulating rack with which a drivingpinion gears and a link jointedly connecting a stationary carrier orbase to a crank plate which is driven from the fan wheelv shaft.

This invention relates to an oscillating fan of the type just referredtov wherein combined oscillations are effected by a combination of partscomprising a crank pin driven from the kfan wheel shaft, and a.connecting rod and a link or equivalent parts,

whereby said crank pin is jointed-ly connected to a stationary carrierbracket of the fan and to a frame or part which can oscillate `on saidbracket and on which frame 3'0 or part the fan wheel can oscillate. lhenthe fan wheel shaft revolves the mechanism imparts to the fan wheel asort or continnous -gyratory motion, swinging the fan wheelsimultaneously up and down and sideways.

The mechanism of the invention is of a very simple character, and isparticularly suitable tothe particular type of electrically driven fannow so extensively used wherein the motor casing is mounted upontrunnions of a bifurcated frame. which in turn is pivotedly mounted upona fixed lnfacket or pedestal, and a single ronnecting rod and a singlelink serve to jointedly connect the crank pin to the carrier bracket andto the oscillating frame or part.

The motor casing is left free to rock upon its trunnions, and the frameis left free to partly revolve within the bracket or pedestal. A wormcarried by the fan wheel shaft drives, through a worm wheel, a smallshaft to which a crank plate is attached, which small shaft may beprovided with a hand operated clutch to disconnect the "5 oscillatingmechanism from the fan wheel shaft. A. connecting rod is universallypivoted at one of its ends to the. crank pin and at its other end to aplate or arm connected to the pivoting peg of the bracket or pedestal.Upon this peg the bifurcated frame is mounted to partly revolve 'oroscillate. vA. lilik jointedly connects a peg;` ot the bifurcated framewith the connectingl rodat a point near the crank plate. i

A friction clutch is provided between the crank plate and the fan wheelshaft so that if the oscillations of the tan wheel are forcibly stoppedby any outside agency the mechanism will not be damaged, Wbut willimmediately pick up again when the fan wheel is released, and it .ispreferable to conceal this clutch within the crank plate itself.

The connection between the crank pin and the crankplate is preferablymade adjustable-in order that the extent of oscillation of the fan wheelin making its substantially `gyratory oscillating movements may beadjusted.

The pegs of the bracket or pedestal and ofthe bifurcated frame to whichthe connecting rod and link are attached are pref erably disposedvwithin the bifurcation of theV frame.

The accompanying drawings show the iuvention, in its most desirableform. applied to `a well known type of electrically driven oscillatingfan.

Fig. l is a side elevation, partly in section.

Fig. 2 is -a rear elevation, also partly in section.

Fig. 3 is a plan view, partly in section, showing the clutch associatedwith the crank plate, the manner in which the crank pin .is adjust-ed onthe crank plate, and the connections between the crank pin and thepedestal and between the crank pin and the frame which supports themotor casing.

Fig'. 4i is a detail representing' how the connection between the crankpin and, the crank plate is adjusted to vary the amount of oscillationof the fan wheel.

The casing a, wit-hin which the electric motorl is fitted and throughwhich the fan wheel shaft c extends, is substantially of the usualconstruction, being mounted to rock freely upon trunnions d, d having'bearings within the branches e2, e3 of a bifurcated frame e which isarranged for part revolution. upon, a stationary bracket or pedestal.

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f. f2 is a rigid peg rising from the bracket or pedestal f, over whichthe bifurcated frame e is mounted and supported to freely partly revolveon an antifriction bearing, such as a ball bearing f3.

Rigidly attached to the rear end of the fan wheel shaft c is a worm gwhich revolves concentrically with said shaft, within va lateralextension a2 of the casing a is mounted a worm wheel ZL which gears withthe worm and drive a small shaft 71,2 which, by a reducing toothed gear,7a3, 7b4, revolves a crank plate z' revolubly carried by the extensiona2 of the casing a. To the crank pin 'Z2 of this crank plate isjointedly connected one end y2 of a connecting rod j, whose other end'7'3 is jointedly connected to an upstanding peg Z2 of an attachmentplate Z fixed to the stationary upright peg f2 of the bracket orpedestal The jointings of this connecting` rod to the crank ypin Z2 andto the peg Z2 are of such a character as to provide substantiallyuniversal joints at the ends of the connecting rod. The peg Z2 is alwaysstationary, that is to say its position is constant, and it forms theprincipal abutment from which the oscillating movements of the fan wheelare forced. n

m is a link jointedly connected at its one end m2 to the connecting rodj near the crank plate, and jointedly connected at its other end m2 to apeg a extending upwardly from the base of the bifurcated frame e, thejointings of this link to the peg n and to the connecting rod being suchas to provide substantially universal joints at the ends of the saidlink.

The peg fn, is a fixture on the bifurcated frame e and always movestherewith, and its osition is set oif from the axis of swing of Jdhebifurcated frame upon the peg f2.

In action, as the crank plate 'i is revolved from the fan wheel shaft,the connecting rod y' automatically partly revolves the bifurcatedfra-me e about the peg f2, to thereby oscillate the fan wheel in one.direction, while the connecting rod m compels the swing of the casing awithin the frame c upon the trunnions (Z, cZ, to thereby oscillate thefan wheel in a direction at a right angle to the rotation on the peg f2,but these two directions of oscillation are so combined by the cofactionof the connecting rod and link to impartto t-he fan wheel an oscillatingmovement of a substantially gyratory character, that is to say, combinedoscillation in both directions simultaneously.

A friction clutch between the crank plate z' and the fan wheel shaft cis provided in connection with' an enlargement 02 of the crank plateshaft 0. This clutch may be in the form of a small ball g working in aradial bore of the crank plate Z and a coiled spring g2 behind said ballto cause the ball to enter a semi-spherical depression c3 in theenlarged part 02 of the shaft 0. If through any cause the casing a isheld against oscillation in its frame or said frame is held againstrotation on the pedestal, the ball q is forced out of the depression ofthe shaft 0 so that said shaft may revolve against the ball pressure byovercoming said pressure. The spring g2 is backed up by the adjustablescrew g3, so that its pressure on the ball may be adjusted. This clutchis concealed within the thickness of the crank plate. Any other suitableform of clutch may be tted to allow of the rotation of the crank platebeing forcibly stopped, if oscillation of the fan wheel is accidentallyprevented.

The crank pin is adjustable as to throw. Its head i3 engages aT-sectioned radial slot 'Z2 in the crank plate (Figs. 3 and l), alongwhich slot said pin is adjustable and may be clamped in adjustedposition by a screwnut Z5, which clamping does not affect the freerocking of the end of the connecting rod j on said crank pin.

A hand-operated member r is slidably mounted upon an extension, r2 ofthe shaft h2 and is keyed to said extension. The worm wheel 7L isloosely mounted on the shaft 71,2 This member r can slide upon theextension r2 to the limit of the space r3, and upon its undersidecarries rigid pegs r4 to engage two of a number of correspondingsinkings in the upper face of the worm wheel 7L, so that said worm wheelonly drives the shaft 7b2 through the member r, which slidesfriction-tight upon the shaft extension. When the member r is actuatedto disengage the pegs thereof from the worm wheel L- the worm wheelrevolves freely on the shaft h2 without imparting motion to the shaft7so that by said disengagement the oscillating movements of the fan canbestopped.

The essential features of the invention, hereinafter specificallydefined in the claims, are the combination with a crank pin driven bythe fan wheel shaft of the connecting rod 7' and the link m, orequivalent parts, whereby said Crank pin is jointedly connected to thestationary carrier bracket f and to the frame or part e which canoscillate on said bracket and ou which frame or part the fan wheel canalso oscillate, and it will be undcrstood that in the carrying out ofthese fea turcs various changes in detail construction may be necessaryall within the spirit of the i invention.

Having now described my invention what l claim and desire to secure byLetters Patent is l. An electrically driven oscillating fau, comprisinga pedestal, a frame mounted for partial rotation on said pedestal, acasing mounted to rock in said frame on an axis at an angle to the axisof rotation of said frame on said pedestal, a fan shaft rotating in saidcasing, a crank rotated by said fan shaft, a link having one of its endsconnected to said crank and its other end connected to said pedestal ata point eccentric to the axis about which said frame partially rotateson said pedestal and means connecting said crank to said frame at apoint eccentric to the axis of rotation of said frame on said pedestal.

2. An electrically driven oscillatingl fan according to claim l, whereinthe connection between the crank and the frame comprises a link havinglone of its ends pivotally connected to the frame at a point eccentric tothc axis of rotation of said frame on the pedestal and having its otherend pivotally connected to the other link.

3. An electrically driven oscillating fan according to Claim 1, whereinthe means for rotating the crank from the fan shaft comprises a worm onsaid fan shaft, a counter shaft associated with said crank and adaptedto drive the latter, a worm wheel loosely mounted on said counter-shaftand.

engaging said worm, and manually operable means for locking said wormwheel to and releasing it from said counter-shaft.

4. An electrically driven oscillatingfan, comprising a pedestal, a framemounted `for partial rotation on said pedestal, a casing` mounted torock in said frame on an axis at an angle to the axis of rotation ofsaid frame on said pedestal, a fan shaft rotating in said casing, arotatable disc driven by said fan shaft, a crank pin adjustable radiallyof said disc, and links connecting Said crank pin to said Yframe at apoint eccentric to its axis of ratation on said pedestal and to saidpedestal eccentrically of the axis of rotation of said frame on thepedestal, re spectively.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

DANIEL EVAN ROGERS.

Vitnesses GEO. FUERY, JOHN P. FUERY.

